COMPAQ COMPUTER CORPORATION
DeskPro 486/50L (Model 001987)
Processor | 80486DX |
Processor Speed | 50MHz |
Chip Set | Compaq |
Max. Onboard DRAM | 104MB (on system memory card) |
Cache | None |
BIOS | Compaq |
Dimensions | 332mm x 333mm |
I/O Options | 32-bit system memory card slot |
NPU Options | 4167 |

CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Bus mouse | C1 | 5.25 inch floppy drive interface | FD2 |
Parallel port | C2 | IDE interface | HDD |
Serial port 1 | C3 | System memory card | MEM |
VGA port | C4 | Drive power | P1-P5 |
Main power | DCIN | VGA feature interface | VGA |
3.5 inch floppy drive interface | FD1 |
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USER CONFIGURABLE SETTINGS | |||
Function | Switch | Position | |
» | Factory configured - do not alter | SW1/1 | Off |
» | EISA configuration unlocked | SW1/2 | Off |
| EISA configuration locked | SW1/2 | On |
» | Floppy drive write enabled | SW1/3 | Off |
| Floppy drive write disabled | SW1/3 | On |
» | Boot drive select determined by EISA configuration | SW1/4 | Off |
| Boot drive select floppy drive | SW1/4 | On |
» | Password check at power-on enabled | SW1/5 | Off |
| Password check at power-on disabled and cleared | SW1/5 | On |
» | EISA configuration enabled | SW1/6 | Off |
| EISA configuration disabled | SW1/6 | On |
SYSTEM MEMORY BOARD (Model 1990)

DRAM CONFIGURATION | ||||||
Size | M0 | M1 | M2 | M3 | M4 | M5 |
4MB | NONE | NONE | NONE | NONE | NONE | NONE |
6MB | 2MB | NONE | NONE | NONE | NONE | NONE |
8MB | 2MB | 2MB | NONE | NONE | NONE | NONE |
10MB | 2MB | 2MB | 2MB | NONE | NONE | NONE |
12MB | 2MB | 2MB | 2MB | 2MB | NONE | NONE |
12MB | 8MB | NONE | NONE | NONE | NONE | NONE |
12MB | 8MB | ----------------- | NONE | NONE | NONE | NONE |
14MB | 2MB | 2MB | 2MB | 2MB | 2MB | NONE |
14MB | 8MB | 2MB | NONE | NONE | NONE | NONE |
14MB | 8MB | ----------------- | 2MB | NONE | NONE | NONE |
16MB | 2MB | 2MB | 2MB | 2MB | 2MB | 2MB |
16MB | 8MB | 2MB | 2MB | NONE | NONE | NONE |
16MB | 8MB | ----------------- | 2MB | 2MB | NONE | NONE |
18MB | 8MB | 2MB | 2MB | 2MB | NONE | NONE |
18MB | 8MB | ----------------- | 2MB | 2MB | 2MB | NONE |
20MB | 8MB | 2MB | 2MB | 2MB | 2MB | NONE |
20MB | 8MB | ----------------- | 2MB | 2MB | 2MB | 2MB |
20MB | 8MB | 8MB | NONE | NONE | NONE | NONE |
20MB | 8MB | ----------------- | 8MB | NONE | NONE | NONE |
20MB | 8MB | ----------------- | 8MB | ----------------- | NONE | NONE |
22MB | 8MB | 2MB | 2MB | 2MB | 2MB | 2MB |
22MB | 8MB | 8MB | 2MB | NONE | NONE | NONE |
22MB | 8MB | ----------------- | 8MB | 2MB | NONE | NONE |
22MB | 8MB | ----------------- | 8MB | ----------------- | 2MB | NONE |
24MB | 8MB | 8MB | 2MB | 2MB | NONE | NONE |
24MB | 8MB | ----------------- | 8MB | 2MB | 2MB | NONE |
24MB | 8MB | ----------------- | 8MB | ----------------- | 2MB | 2MB |
26MB | 8MB | 8MB | 2MB | 2MB | 2MB | NONE |
26MB | 8MB | ----------------- | 8MB | 2MB | 2MB | 2MB |
28MB | 8MB | 8MB | 2MB | 2MB | 2MB | 2MB |
28MB | 8MB | 8MB | 8MB | NONE | NONE | NONE |
28MB | 8MB | ----------------- | 8MB | 8MB | NONE | NONE |
28MB | 8MB | ----------------- | 8MB | ----------------- | 8MB | NONE |
28MB | 8MB | ----------------- | 8MB | ----------------- | 8MB | ----------------- |
30MB | 8MB | 8MB | 8MB | 2MB | NONE | NONE |
30MB | 8MB | ----------------- | 8MB | 8MB | 2MB | NONE |
30MB | 8MB | ----------------- | 8MB | ----------------- | 8MB | 2MB |
32MB | 8MB | 8MB | 8MB | 2MB | 2MB | NONE |
32MB | 8MB | ----------------- | 8MB | 8MB | 2MB | 2MB |
34MB | 8MB | 8MB | 8MB | 2MB | 2MB | 2MB |
36MB | 8MB | 8MB | 8MB | 8MB | NONE | NONE |
DRAM CONFIGURATION | ||||||
Size | M0 | M1 | M2 | M3 | M4 | M5 |
36MB | 8MB | ----------------- | 8MB | 8MB | 8MB | NONE |
36MB | 8MB | ----------------- | 8MB | ----------------- | 8MB | 8MB |
36MB | 32MB | ----------------- | NONE | NONE | NONE | NONE |
38MB | 8MB | 8MB | 8MB | 8MB | 2MB | NONE |
38MB | 8MB | ----------------- | 8MB | 8MB | 8MB | 2MB |
38MB | 32MB | ----------------- | 2MB | NONE | NONE | NONE |
40MB | 8MB | 8MB | 8MB | 8MB | 2MB | 2MB |
40MB | 32MB | ----------------- | 2MB | 2MB | NONE | NONE |
44MB | 8MB | 8MB | 8MB | 8MB | 8MB | NONE |
44MB | 8MB | ----------------- | 8MB | 8MB | 8MB | 8MB |
44MB | 32MB | ----------------- | 2MB | 2MB | 2MB | 2MB |
44MB | 32MB | ----------------- | 8MB | NONE | NONE | NONE |
44MB | 32MB | ----------------- | 8MB | ----------------- | NONE | NONE |
46MB | 8MB | 8MB | 8MB | 8MB | 8MB | 2MB |
46MB | 32MB | ----------------- | 8MB | 2MB | NONE | NONE |
46MB | 32MB | ----------------- | 8MB | ----------------- | 2MB | NONE |
52MB | 8MB | 8MB | 8MB | 8MB | 8MB | 8MB |
52MB | 32MB | ----------------- | 8MB | 8MB | NONE | NONE |
52MB | 32MB | ----------------- | 8MB | ----------------- | 8MB | ----------------- |
54MB | 32MB | ----------------- | 8MB | 8MB | 2MB | NONE |
54MB | 32MB | ----------------- | 8MB | 8MB | ----------------- | 2MB |
56MB | 32MB | ----------------- | 8MB | 8MB | 2MB | 2MB |
60MB | 32MB | ----------------- | 8MB | 8MB | 8MB | NONE |
60MB | 32MB | ----------------- | 8MB | ----------------- | 8MB | 8MB |
62MB | 32MB | ----------------- | 8MB | 8MB | 8MB | 2MB |
68MB | 32MB | ----------------- | 8MB | 8MB | 8MB | 8MB |
68MB | 32MB | ----------------- | 32MB | ----------------- | NONE | NONE |
70MB | 32MB | ----------------- | 32MB | ----------------- | 2MB | NONE |
72MB | 32MB | ----------------- | 32MB | ----------------- | 2MB | 2MB |
76MB | 32MB | ----------------- | 32MB | ----------------- | 8MB | NONE |
76MB | 32MB | ----------------- | 32MB | ----------------- | 8MB | ----------------- |
78MB | 32MB | ----------------- | 32MB | ----------------- | 8MB | 2MB |
84MB | 32MB | ----------------- | 32MB | ----------------- | 8MB | 8MB |
100MB | 32MB | ----------------- | 32MB | ----------------- | 32MB | ----------------- |
Note: The system memory card uses proprietary memory modules, some require only one module space on the memory board, while others require two. In the cases where a double size module is used, the following space is marked with "-----------------", designating that space as occupied. | ||||||